21222003030 has 96 divisors (see below), whose sum is σ = 52425073152. Its totient is φ = 5497962240.

The previous prime is 21222002999. The next prime is 21222003031. The reversal of 21222003030 is 3030022212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222003031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14270947 + ... + 14272433.

It is an arithmetic number, because the mean of its divisors is an integer number (546094512).

Almost surely, 2^21222003030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222003030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26212536576).

21222003030 is an abundant number, since it is smaller than the sum of its proper divisors (31203070122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222003030 is a wasteful number, since it uses less digits than its factorization.

21222003030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21222003030 its reverse (3030022212), we get a palindrome (24252025242).

The spelling of 21222003030 in words is "twenty-one billion, two hundred twenty-two million, three thousand, thirty".